Question

我有一个关于recycleview自定义的适配器，我没有sqlite，也不知道如何使用它

Answer 1

public class WordAdapter extends RecyclerView.Adapter<WordAdapter.ViewHolder> {
 private Context mContext ;
 private ArrayList<WordClass> mList;
 private OnItemClickListener mListener;


 public WordAdapter(Context context, ArrayList<WordClass> liste){
     this.mContext = context;
     this.mList = liste;

 }

 public void setOnClickListener(OnItemClickListener listener){
     this.mListener = listener;

 }

@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int i) {
    View view = LayoutInflater.from(mContext)
            .inflate(R.layout.list_item,parent,false);
    return new ViewHolder(view);
}

@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, int position) {
           final WordClass wordClass = mList.get(position);
           viewHolder.mTextView.setText(wordClass.getmTextV1());
           viewHolder.btnCopy.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View v) {
                   String s = wordClass.getmTextV1();
                  ClipboardManager  myClipboard = (ClipboardManager) v.getContext().getSystemService(Context.CLIPBOARD_SERVICE);

                  ClipData  myClip = ClipData.newPlainText("label", s);

                   myClipboard.setPrimaryClip(myClip);
                   Toast.makeText(v.getContext(),R.string.copy, Toast.LENGTH_SHORT).show();
               }
           });

           viewHolder.btnFav.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View v) {
                   Toast.makeText(v.getContext(),R.string.fav, Toast.LENGTH_SHORT).show();
               }
           });
}

@Override
public int getItemCount() {
    return mList.size();
}

public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{

     private TextView mTextView;
     private ImageButton btnShare;
     private ImageButton btnCopy;
     private ImageButton btnFav;
    public ViewHolder(@NonNull View itemView) {
        super(itemView);

        mTextView = itemView.findViewById(R.id.text1);
        btnShare = itemView.findViewById(R.id.btn_share_text);
        btnCopy = itemView.findViewById(R.id.btn_copy_text);
        btnFav = itemView.findViewById(R.id.btn_favorite_text);


        itemView.setOnClickListener(this);
        btnShare.setOnClickListener(this);
        btnCopy.setOnClickListener(this);
        btnFav.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        if(mListener != null){
            int pos = getAdapterPosition();
            mListener.OnItemClick(v,pos);
        }
    }
}

}

使用sqlite android studio的android中的收藏夹回收视图和收藏夹按钮

1 个答案: